<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title></title>
    <script src="../vue.js"></script>
    <style>
        .v-enter,.v-leave-to{
            opacity:0;
        }
        .v-enter-active,.v-leave-active{
            transition:opacity 1s;
        }
    </style>
</head>
<body>
<div id="app">
    <transition mode="out-in">
        <!--动态组件-->
        <component :is="type"></component>
    </transition>
    <button @click="handleClick">toggle</button>
</div>

<script>
    Vue.component('child',{
        template:'<div>child</div>'
    })
    Vue.component('child-one',{
        template:'<div>child-one</div>'
    })
    var vm = new Vue({
        el: "#app",
        data: {
            type:'child'
        },
        methods:{
            handleClick: function () {
                this.type=this.type==='child'?'child-one':'child'
            }
        }

    })
</script>
</body>
</html>